Rowan johnston



(No Model.)

R. JOHNSTON.

ENVELOP.

No. 588,679. Patented Aug. 24,1897.

WITNESSES /NVENTUB ATTORNEYJ- THE NORM! PETERS 00.. mm'uumo" WASHINGTON,o c.

UNITED STATES PATENT OFFI ROIVAN JOHNSTON, OF CALGARY, CANADA.

ENVELO P.

SPECIFICATION forming part of Letters Patent No. 588,679, dated August24, 1897.

Application filed January 26, 1897. Serial No. 620,718. (No model.)

To all whom it may concern:

Be it known that I, ROWAN J 0HNSTON,acitizen of the Dominion of Canada,residing at Calgary, in the district of Alberta, Northwest Territoriesof Canada, have invented certain new and useful Improvements inEnvelops, of which the following is a full and complete specification,such as will enable those skilled in the art to which it appertains tomake and use the same.

This invention relates to envelops; and the object thereof is to providean improved device of this class which is so constructed that when theenvelop has been sealed it cannot be opened without leaving evidence ofthe fact or without destroying the same.

The invention is fully disclosed in the following specification, ofwhich the accompanying drawings form a part, in which Figure 1 is ablank from which my improved envelop is made; Fig. 2, a similar viewshowing the blank partially folded, and Fig. 3 a back View of theenvelop folded and sealed.

In the drawings forming part of this specification the separate parts ofmy improvement are designated by the saine letters of reference in eachof the views, and in the practice of my invention I cut from a sheet ofpaper of any desired color or quality the blank shown in Fig.' 1, saidblank consisting of a body portion A, a folding side 13, a flap C, andfolding end pieces D and G.

One end of the folding side B is projected in line with the end of thebody portion A and is provided with an extension I), on which is formedatongue b and that side of the folding end D adjacent to the flap isprojected in line with the body portion A and is provided with asemicircular notch or recess 01 and with an extension 01 The flap C isgummed on its under surface in the usual manner, as shown at C and theflap B, together with the extension I) and the tongue 6 are gummed ontheir inner surfaces, as shown at 72 and the extension d and the outerend of the folding end- D are gummed on their inner surfaces, as shownat d In preparing the envelop for use the folding end G is first foldedover the back of the body portion, after which the folding end D isfolded over and sealed to the end G, and

the extension d is folded around the end of the envelop, as shown indotted lines in Fig. 2, and sealed thereto, and the side B is thenfolded over and sealed to end D, after which the flap C is folded overand sealed to said side and said end, and the extension I? is thensealed to the flap, and the tongue 6 is folded over the edge of theenvelop and sealed thereto, as shown in Fig. 3 in dotted lines.

The folding end D is almost as long as the body portion of the envelop,and the folding end Gis much shorter, and when constructed and sealed inthe manner described it will be apparent that the envelop cannot beunsealed without tearing off the tongue 19 of the extension I), alsowithout tearing off said extension, and this is also true of theextension 61 of the folding end D, and the tearing off of these partswill be proof of the fact that the envelop has been sealed and opened.

My improvement is simple in construction and operation and does not addmaterially to the cost of the envelop.

Having fully described my invention, I claim as new and desire to secureby Letters Patent- 1. An envelop composed of a blank, said blankconsisting of a body portion, and two folding ends as D, and G, thefolding end D, being provided with an extension (1 and the upper sidethereof being in the same line with the body portion of the envelop, andsaid body portion being provided with a folding side and a folding,flap, one end of said folding side being projected in line with the endof the body portion of the envelop, and

being provided with an extension on which is formed a tongue, said endportion, said flap and said folding side being gummed on their innersurfaces, substantially as shown and described.

2. An envelop composed of a blank,said blank consisting of a bodyportion, and two folding ends as D, and G, the folding end D, beingprovided with an extension CV, and the upper side thereof, being in thesame line with the body portion of the envelop, and said body portionbeing provided with a folding side and a folding flap, one end of saidfolding side being projected in line with the end of the body portion ofthe envelop, and

being provided with an extension which is my invention I have signed myname, in presformed on the tongue, said end portion, said enoeof thesubscribing witnesses, this 16th flap and said folding side being gummedon day of January, 1897.

their inner surfaces, and the folding end D, ROWVAN JOHNSTON. 5 beinglonger than the folding end G, sub- W'itnesses:

stantially as shown and described. ARTHUR FREDERICK Momronn BROOKE,

In testimony that I claim the foregoing as HENRY HAMILTON MCCULLOCII.

